EP0726447B1 - Incremental route calculation - Google Patents

Incremental route calculation Download PDF

Info

Publication number
EP0726447B1
EP0726447B1 EP96300873A EP96300873A EP0726447B1 EP 0726447 B1 EP0726447 B1 EP 0726447B1 EP 96300873 A EP96300873 A EP 96300873A EP 96300873 A EP96300873 A EP 96300873A EP 0726447 B1 EP0726447 B1 EP 0726447B1
Authority
EP
European Patent Office
Prior art keywords
route
intermediate destination
road
destination
cost
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96300873A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0726447A1 (en
Inventor
Jeff J. Liaw
Simon P: Desai
Haruhisa Tamai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Visteon Technologies LLC
Original Assignee
Visteon Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Visteon Technologies LLC filed Critical Visteon Technologies LLC
Publication of EP0726447A1 publication Critical patent/EP0726447A1/en
Application granted granted Critical
Publication of EP0726447B1 publication Critical patent/EP0726447B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
    • G01C21/34—Route searching; Route guidance
    • G01C21/3446—Details of route searching algorithms, e.g. Dijkstra, A*, arc-flags, using precalculated routes

Definitions

  • the present invention relates to the determination of routes by a vehicle navigation system. More specifically, the invention provides a method of determining an intermediate route to a user's final destination where the determination of the entire route takes longer than a given interval of time. In this way, the user may begin driving before the entire route to the final destination has been determined.
  • EP 0 485 120 and GB 2271423 disclose vehicle navigation system in which portions of an optimum route are presented to a vehicle operator sequentially.
  • the present invention provides a way in which an intermediate route may be determined to a location between the initial starting or source location and the final destination.
  • the user of a vehicle navigation system generally requires only enough information to get to a nearby highway in order to begin driving.
  • a method of determiriing a route from a source location to a final destination using a vehicle navigation system having a map database comprising the steps of:
  • the roads in the map database are organized hierarchically, each road having a hierarchy level associated therewith.
  • the source location corresponds to a source road of a first hierarchy level.
  • the intermediate destination candidates are determined in the following manner. Possible routes from a first road segment connected to the source location are explored until a connecting road is encountered having a second hierarchy level higher than the first. The access point to the connecting road is then designated as a intermediate destination candidate. This is repeated for each of the road segments extending from the source location.
  • each intermediate route includes at least one node and at least one road segment which are stored in the map database, and which connect the source location with the intermediate destination candidate corresponding to that intermediate route.
  • Each node in the map database has an associated node cost
  • each road segment in the map database has an associated segment cost.
  • the cost value for an intermediate destination candidate is calculated as follows. The segment and node costs for the road segments and nodes in the intermediate route are combined, thereby generating a route cost for the intermediate route. A heuristic cost for the intermediate destination candidate associated with the intermediate route is then determined. The heuristic cost corresponds to the distance between the intermediate destination candidate and the final destination.
  • a segment cost corresponds to an estimate of a time interval required for traversing a road segment
  • a node cost corresponds to an estimate of a time interval required for traversing a node
  • a first distance corresponds to a substantially straight-line distance between a first intermediate destination candidate and the final destination.
  • the present invention waits until the expiration of a timeout period before selecting a best intermediate destination. This is so that if the entire route to the final destination is determined before the end of the timeout period, and communication of an intermediate route therefore becomes unnecessary, the communication of the entire route may begin instead.
  • the system determines another intermediate destination candidate between the first intermediate destination candidate and the final destination. Initially, at least one next intermediate destination candidate is determined from the map database. As with the previously described embodiment, if more than one next intermediate destination candidate is found, a cost value is calculated for each, the next intermediate destination candidate with the lowest cost value being selected as the best next intermediate destination.
  • next intermediate route corresponding to the best next intermediate destination is then communicated to the user. This process may be repeated until the remainder of the entire route has been determined. In a specific embodiment, each intermediate route is fully determined and communicated to the user only when the determination of the remainder of the entire route requires more than a programmable timeout interval.
  • the present invention relates generally to commonly assigned United States Patents No. 5,345,382 to Kao for CALIBRATION METHOD FOR A RELATIVE HEADING SENSOR, and No. 5,359,529 to Snider for ROUTE GUIDANCE ON/OFF-ROUTE STATE FILTER, and commonly assigned, copending United States patent applications for POSITION CORRECTION METHOD FOR VEHICLE NAVIGATION SYSTEM, Serial No. 08/000,950 filed on January 5, 1993, METHOD FOR SELECTING A DESTINATION IN A VEHICLE NAVIGATION SYSTEM, Serial No.
  • Fig. 1 is a block diagram of a specific embodiment of a vehicle navigation system 10 for use with the present invention.
  • Sensors 12 and 14 and GPS receiver 18 are coupled to computing means 20 through sensor/GPS interface 22.
  • mileage sensor 12 comprises an odometer
  • angular velocity sensor 14 comprises a gyroscope, or a differential odometer coupled to the wheels of the vehicle.
  • a global positioning system (GPS) data receiver 18 is provided for receiving signals from, for example, a satellite-based navigation system. Data from sensor/GPS interface 22 is transmitted to CPU 24, which performs calibration, signal processing, dead-reckoning, vehicle positioning, and route guidance functions.
  • GPS global positioning system
  • a database containing map information may be stored in database medium 26, with software directing the operation of computing means 20 stored in main memory 28 for execution by CPU 24.
  • Memory 28 may comprise read-only memory (ROM), or reprogrammable non-volatile memory such as flash memory or SRAM.
  • System RAM 30 permits reading and writing of the information necessary to execute such software programs.
  • Database medium 26 may comprise non-volatile memory, a hard disk drive, CD-ROM, or an integrated circuit in which digitized map information has been stored.
  • Output controller 32 which may comprise a graphics controller, receives data processed by CPU 24 and transmits the data to display console 40 which includes output communicator 34, usually comprising a display screen. The user may input data, such as a desired destination, through user interface 36, typically comprising a keyboard.
  • the map database stored in database medium 26 preferably comprises positional data such as, for example, latitude and longitude coordinates, to describe road intersections or nodes, road segments, landmarks and points of interest, and other geographical information.
  • the data base may further comprise data representing characteristics of roads or places on the map, such as road and place names, road features such as dividers, one-way restrictions, surface, speed limit, shape, elevation, and other properties.
  • the map database includes cost values associated with individual nodes and road segments. These cost values correspond to the estimates of time intervals for traversing the respective node or segment. Node cost values take into consideration such information as, for example, whether the vehicle would encounter oncoming traffic, thus delaying a left turn maneuver.
  • Segment costs reflect road segment characteristics such as speed limit and segment length, both of which affect the travel time along the segment.
  • a hierarchy value which relates to the category or type of the road. For example, the highest level category of the hierarchy includes freeways and expressways. The lowest level includes residential streets and/or alleys.
  • vehicle navigation system 10 employs a two-ended route calculation algorithm. That is, system 10 explores paths emanating from point A and paths leading backwards from point B. Initially, the search patterns emanate from both points A and B in all directions.
  • Fig. 2 illustrates how one of four road segments emanating from point A is chosen for continued route exploration.
  • Each road segment, n has an associated segment cost, g(n), and each node, k, has associated node and heuristic costs, g(k) and h(k), respectively.
  • the segment cost for each segment is added to the node and heuristic costs for its endpoint to obtain an overall cost value for each.
  • the road segment having the lowest overall cost is then selected for further calculation.
  • the road segment terminating at point D is selected primarily because the heuristic cost associated with point D, i.e., the distance between points D and B, is less than the heuristic costs associated with points C, E, and F.
  • This process is then repeated for point D, and each newly calculated route point thereafter. It should be noted that the heuristic cost for each new possible route point is calculated based on the distance between the possible route point and the last determined route point at the other end of the search.
  • the present invention avoids these delays by selecting an intermediate destination close to the initial source location, calculating a route to the intermediate location, and communicating the intermediate route while continuing to determine the route to the final destination. But how does the system know when to use this feature?
  • the feature may be selected based on parameters such as the known relationship between the initial source location and the final destination and their geographical surroundings, e.g., both locations are in densely digitized urban areas separated by a sparsely digitized rural or highway area.
  • intermediate destinations are always determined, but a best intermediate destination is not chosen and the intermediate route is not communicated to the user unless the determination of the entire route takes longer than a programmable timeout period. This embodiment will be discussed in greater detail below. The method by which the present invention selects an intermediate destination is described with reference to Fig. 3.
  • Fig. 3 shows a source location at point A and a final destination at point B.
  • Point A generally represents the stationary starting position of the vehicle. However, if route calculation is performed while the vehicle is moving, point A may be chosen at a position ahead of the current vehicle position. Parameters such as the vehicle's direction and speed may be taken into account for the determination of the source location in such a situation.
  • Four possible intermediate routes 201, 203, 205, and 207 are shown from point A to four different intermediate destinations 202, 204, 206, and 208, respectively.
  • the intermediate destinations in this example are access points to highways 210 and 212. Highway access points are often chosen as intermediate destinations because they are easily identifiable, and the forward route calculation from the highway access point becomes simplified for the reasons discussed above. Essentially, the intersection with any road which is of a higher category than the road of the source location may be selected as a possible intermediate destination.
  • the navigation system explores several possible paths in the map database emanating from point A during a timeout interval, after the expiration of which, the best candidate for the intermediate destination is chosen.
  • the timeout interval may be a multilevel interval. That is, the interval may be programmed to expire after 10 seconds if 3 or more candidates are found, and after 20 seconds if only one or two are found.
  • the figure shows a situation in which four candidates for an intermediate destination have been found, i.e., highway access points 202, 204, 206, and 208.
  • the system calculates an overall cost f(dest) for each possible intermediate destination by combining all of the segment and node costs, i.e., g(n) and g(k), for the route leading to that destination with the heuristic cost associated with that destination, i.e., h(dest).
  • f(dest) the overall cost for each possible intermediate destination by combining all of the segment and node costs, i.e., g(n) and g(k), for the route leading to that destination with the heuristic cost associated with that destination, i.e., h(dest).
  • the relationship appears as follows: It will be understood that there are a number of different ways in which these values could be combined, or in which cost values may be assigned to derive an overall cost value for each intermediate route. The present invention is not limited to the specific embodiment described.
  • Another method for selecting an intermediate destination is provided by the present invention.
  • the user is presented with a list of highways and highway access points within 10 miles of the source location. The user may then select the desired highway and/or specific access point. This feature may be useful where, for example, the user knows that she needs to access a certain highway but requires route calculation to get to that highway from her current location.
  • the appropriate series of maneuvers are communicated to the user via the system display.
  • These generally comprise a series of screens, each of which communicates information regarding the next maneuver to be performed by the user like, for example, the distance to the next maneuver, or the nature of the next maneuver (e.g., left turn).
  • the system is providing the user with this information, the remainder of the route to the final destination and the corresponding maneuvers are determined using the intermediate destination as the starting point. In this way, navigation is allowed to begin before the entire route is determined, thereby allowing the user to begin driving almost immediately.
  • the vehicle navigation system may be programmed to wait until the expiration of a timeout period before selecting an intermediate destination. If the entire route to the final destination is determined within the timeout period, then the communication of an intermediate route is considered unnecessary and the intermediate destination is not selected. If, however, the entire route to the final destination is not complete before the expiration of the timeout interval, the system selects an intermediate destination and operates as described above. If the entire route is still not complete before the expiration of another timeout interval, the system may be programmed to determine another intermediate destination beyond the first intermediate destination. The selection of the next intermediate destination proceeds similarly to the selection of the first as described above. This process may be repeated until the remainder of the entire route has been determined.
  • the system may be programmed to begin determining the next intermediate destination immediately if it is determined that the calculation of the route to the final destination is not yet complete.
  • the system may be programmed so that each successive intermediate route is fully determined and the corresponding maneuvers communicated to the user only when the determination of the remainder of the entire route is not yet complete or requires more than a programmable timeout interval.
  • the intermediate location is a highway access point
  • the maneuver onto the highway can be communicated to the user with a follow up instruction such as, for example, "Stay on the highway - Calculating the rest of the route". How then does the system know which direction of travel on the highway to communicate?
  • the direction of travel is deduced based on the direction from the highway access point to the final destination.
  • a first intermediate destination 301 is chosen before either of the access points 302 or 303 as shown in Fig. 4 so that either highway direction may be selected. In the mean time, another intermediate destination beyond the first intermediate destination, the route to which will be known by the time the first intermediate destination is reached.
  • Another solution to the problem of arriving at the first intermediate destination relates to the determination of further intermediate destinations.
  • the system may be programmed to determine another intermediate destination beyond the first intermediate destination.
  • the selection of the next intermediate destination proceeds similarly to the selection of the first as described above. This process may be repeated until the remainder of the entire route has been determined.
  • each intermediate route is fully determined and the corresponding maneuvers communicated to the user only when the determination of the remainder of the entire route requires more than a programmable timeout interval.
  • Fig. 5 is a flowchart 500 which describes the operation of a specific embodiment of the invention.
  • the system receives a destination input by a user for the purpose of calculating a route to the destination (step 502).
  • the system then begins to determine the route from the vehicle's current position to the desired destination while simultaneously determining at least one intermediate destination (step 504).
  • the system determines a cost value for each intermediate destination (step 506). If a programmable time interval passes and the determination of the entire route from the initial position to the final destination is not complete (step 508), the system selects the intermediate destination having the lowest cost value as the best intermediate destination (step 510) and communicates the intermediate route to the user (step 512).
  • the system then continues to determine a route to the final destination from the intermediate destination (step 514). If, on the other hand, the determination of the entire route is complete, the entire route is communicated to the user (step 516).
  • step 518 determines another group of intermediate destinations between the first intermediate destination and the final destination (step 520) and determines a cost values for each (step 522). If the route calculation is not complete after a second programmable time interval (step 524), the system again selects the intermediate destination with the lowest cost value (step 526) and communicates the next intermediate route to the user (step 528). Steps 518-528 may be repeated until the remainder route to the final destination has been determined, at which point it is communicated to the user (step 530).
  • Fig. 6 is a flowchart 600 describing the selection of a plurality of intermediate routes according to a specific embodiment of the invention.
  • the system explores possible routes emanating from one of the road segments directly connected to the vehicle's original position until a connecting road is encountered having a hierarchy level greater than the hierarchy level of the original position's road (step 602).
  • the system then designates the access point to the connecting road as one of the intermediate destinations (step 604). Steps 602 and 604 are then repeated for each of the road segments emanating from the original position (step 606).
  • Fig. 7 is a flowchart 700 describing the determination of cost values for a plurality of intermediate destinations according to a specific embodiment of the invention.
  • the system combines the segment and node costs for the road segments and nodes in one of the intermediate routes emanating from the vehicle's initial position, thereby generating a route cost for that intermediate route (step 702).
  • the system determines a heuristic cost for the intermediate destination associated with the intermediate route (step 704).
  • the heuristic cost corresponds to the distance between the intermediate destination and the final destination.
  • the system then combines the route cost with the heuristic cost and generates a cost value for the intermediate destination (step 706). Steps 702-706 are then repeated for each of the intermediate destinations (step 708).

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Navigation (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Traffic Control Systems (AREA)
  • Instructional Devices (AREA)
EP96300873A 1995-02-09 1996-02-09 Incremental route calculation Expired - Lifetime EP0726447B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/385,611 US5712788A (en) 1995-02-09 1995-02-09 Incremental route calculation
US385611 1995-02-09

Publications (2)

Publication Number Publication Date
EP0726447A1 EP0726447A1 (en) 1996-08-14
EP0726447B1 true EP0726447B1 (en) 2002-11-06

Family

ID=23522132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96300873A Expired - Lifetime EP0726447B1 (en) 1995-02-09 1996-02-09 Incremental route calculation

Country Status (6)

Country Link
US (1) US5712788A (ja)
EP (1) EP0726447B1 (ja)
JP (1) JP3408908B2 (ja)
KR (1) KR100281293B1 (ja)
CA (1) CA2167636C (ja)
DE (1) DE69624601D1 (ja)

Families Citing this family (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1202028A1 (en) * 1994-09-08 2002-05-02 Matsushita Electric Industrial Co., Ltd. Method and system of route selection
US5938720A (en) * 1995-02-09 1999-08-17 Visteon Technologies, Llc Route generation in a vehicle navigation system
US5729458A (en) * 1995-12-29 1998-03-17 Etak, Inc. Cost zones
JPH09297032A (ja) * 1996-05-02 1997-11-18 Pioneer Electron Corp 経路設定方法および装置
JPH109884A (ja) * 1996-06-24 1998-01-16 Mitsubishi Electric Corp 車両用経路案内装置および経路探索方法
US5878368A (en) * 1996-09-13 1999-03-02 Magellan Dis, Inc. Navigation system with user definable cost values
US5916299A (en) * 1996-11-25 1999-06-29 Etak, Inc. Method for determining exits and entrances for a region in a network
US5978730A (en) 1997-02-20 1999-11-02 Sony Corporation Caching for pathfinding computation
US6112154A (en) * 1997-05-22 2000-08-29 Siemens Aktiengesellschaft Method and apparatus for determining a route on a digitized road network stored in the memory of a navigation system
JPH11261626A (ja) * 1998-03-09 1999-09-24 Mitsubishi Electric Corp データ配送システムおよびデータ配送方法
JPH11304518A (ja) * 1998-04-22 1999-11-05 Sanyo Electric Co Ltd ナビゲーション装置
US6539080B1 (en) * 1998-07-14 2003-03-25 Ameritech Corporation Method and system for providing quick directions
US6088649A (en) * 1998-08-05 2000-07-11 Visteon Technologies, Llc Methods and apparatus for selecting a destination in a vehicle navigation system
US6175804B1 (en) 1999-03-11 2001-01-16 Lockheed Martin Corp. Computation of routes for bounding overwatch operations
DE19928295A1 (de) * 1999-06-22 2000-12-28 Bosch Gmbh Robert Verfahren und Vorrichtung zum Bestimmen einer Route von einem Ausgangsort zu einem Zielort
US6427117B1 (en) * 1999-07-14 2002-07-30 Kabushikikaisha Equos Research Navigation method, navigation system, and information communications apparatus used in the navigation system
DE19947789A1 (de) * 1999-10-05 2001-04-12 Mannesmann Vdo Ag Verfahren zur Bestimmung einer Fahrtroute für ein Strassenfahrzeug
US6604081B1 (en) * 2000-01-04 2003-08-05 Transportation Costing Group, Inc. Method for analyzing profitability of freight load hauling operations
US6456935B1 (en) 2000-03-28 2002-09-24 Horizon Navigation, Inc. Voice guidance intonation in a vehicle navigation system
US6735516B1 (en) 2000-09-06 2004-05-11 Horizon Navigation, Inc. Methods and apparatus for telephoning a destination in vehicle navigation
US7035856B1 (en) * 2000-09-28 2006-04-25 Nobuyoshi Morimoto System and method for tracking and routing shipped items
US6622088B2 (en) * 2001-03-02 2003-09-16 Hill-Rom Services, Inc. Ambulatory navigation system
US6456931B1 (en) * 2001-03-07 2002-09-24 Visteon Technologies, Llc Indicating directions to destination and intermediate locations in vehicle navigation systems
US20050065779A1 (en) * 2001-03-29 2005-03-24 Gilad Odinak Comprehensive multiple feature telematics system
US6885735B2 (en) * 2001-03-29 2005-04-26 Intellisist, Llc System and method for transmitting voice input from a remote location over a wireless data channel
USRE46109E1 (en) * 2001-03-29 2016-08-16 Lg Electronics Inc. Vehicle navigation system and method
US20020143611A1 (en) * 2001-03-29 2002-10-03 Gilad Odinak Vehicle parking validation system and method
US8175886B2 (en) 2001-03-29 2012-05-08 Intellisist, Inc. Determination of signal-processing approach based on signal destination characteristics
US6487494B2 (en) * 2001-03-29 2002-11-26 Wingcast, Llc System and method for reducing the amount of repetitive data sent by a server to a client for vehicle navigation
US7406421B2 (en) 2001-10-26 2008-07-29 Intellisist Inc. Systems and methods for reviewing informational content in a vehicle
GB2379047B (en) * 2001-04-26 2004-06-16 Nihon Dot Com Co Ltd System and method for providing temporary access to content
JP2002334241A (ja) * 2001-05-11 2002-11-22 Mitsubishi Electric Corp ナビゲーションシステムと連係した販売支援システムおよびその方法
US7283905B1 (en) 2001-12-11 2007-10-16 Garmin Ltd. System and method for estimating impedance time through a road network
US6704645B1 (en) * 2001-12-11 2004-03-09 Garmin Ltd. System and method for estimating impedance time through a road network
DE10162359B4 (de) * 2001-12-18 2012-10-31 Robert Bosch Gmbh Verfahren zur Bereitstellung von Routendaten für ein Navigationsgerät
US6545637B1 (en) 2001-12-20 2003-04-08 Garmin, Ltd. Systems and methods for a navigational device with improved route calculation capabilities
US6847890B1 (en) 2001-12-21 2005-01-25 Garmin Ltd. Guidance with feature accounting for insignificant roads
US6892135B1 (en) 2001-12-21 2005-05-10 Garmin Ltd. Navigation system, method and device with automatic next turn page
US6975940B1 (en) * 2001-12-21 2005-12-13 Garmin Ltd. Systems, functional data, and methods for generating a route
US6999873B1 (en) 2001-12-21 2006-02-14 Garmin Ltd. Navigation system, method and device with detour algorithm
US7277794B1 (en) 2001-12-21 2007-10-02 Garmin Ltd. Guidance with feature accounting for insignificant roads
US7184886B1 (en) 2001-12-21 2007-02-27 Garmin Ltd. Navigation system, method and device with detour algorithm
US8249880B2 (en) * 2002-02-14 2012-08-21 Intellisist, Inc. Real-time display of system instructions
US7647232B2 (en) 2002-02-21 2010-01-12 Lockheed Martin Corporation Real-time team coordination system for reconnaissance and surveillance missions
US6718261B2 (en) 2002-02-21 2004-04-06 Lockheed Martin Corporation Architecture for real-time maintenance of distributed mission plans
US6687606B1 (en) 2002-02-21 2004-02-03 Lockheed Martin Corporation Architecture for automatic evaluation of team reconnaissance and surveillance plans
US6725152B2 (en) * 2002-02-21 2004-04-20 Lockheed Martin Corporation Real-time route and sensor planning system with variable mission objectives
US7221287B2 (en) 2002-03-05 2007-05-22 Triangle Software Llc Three-dimensional traffic report
AU2003248523A1 (en) 2002-05-16 2003-12-02 Intellisist, Llc System and method for dynamically configuring wireless network geographic coverage or service levels
US8649975B2 (en) 2002-08-29 2014-02-11 Mapquest, Inc. Automated route determination
US7133771B1 (en) * 2002-08-29 2006-11-07 America Online, Inc. Automated route determination to avoid a particular maneuver
US7474960B1 (en) 2002-12-30 2009-01-06 Mapquest, Inc. Presenting a travel route
US7321824B1 (en) 2002-12-30 2008-01-22 Aol Llc Presenting a travel route using more than one presentation style
US7818116B1 (en) 2002-12-30 2010-10-19 Mapquest, Inc. Presenting a travel route in a ground-based vehicle
US20060212185A1 (en) * 2003-02-27 2006-09-21 Philp Joseph W Method and apparatus for automatic selection of train activity locations
DE10329507A1 (de) * 2003-06-30 2005-02-10 Siemens Ag Verfahren und Navigationssystem zur Routenbestimmung mit Zwischenzielen
US7610145B2 (en) 2003-07-25 2009-10-27 Triangle Software Llc System and method for determining recommended departure time
KR101128921B1 (ko) * 2004-07-09 2012-03-27 테직 커뮤니케이션 인코포레이티드 다의적 문자의 명확화
KR100705224B1 (ko) 2005-05-16 2007-04-06 엘지전자 주식회사 네비게이션 시스템에서의 이동체의 주행경로 탐색방법
US7925320B2 (en) * 2006-03-06 2011-04-12 Garmin Switzerland Gmbh Electronic device mount
DE102006018880A1 (de) * 2006-04-24 2007-10-31 Siemens Ag Verfahren zum Ermitteln von Mindestkosten
DE102006018879A1 (de) * 2006-04-24 2007-10-31 Siemens Ag Verfahren und Vorrichtung zum Ermitteln von Mindestkosten von einem Startort zu einem Zielort für die Planung einer Route
DE102006018877A1 (de) * 2006-04-24 2007-10-31 Siemens Ag Verfahren und Vorrichtung zum Ermitteln von Mindestkosten von einem Startort zu einem Zielort
EP1939590B1 (en) * 2006-12-29 2018-03-07 Magneti Marelli S.p.A. A method of calculating an optimal path between a starting point and a destination point, and constrained to pass through an intermediate waypoint, a navigation system and a corresponding computer program product
US8554475B2 (en) 2007-10-01 2013-10-08 Mitac International Corporation Static and dynamic contours
JP4513073B2 (ja) * 2007-12-25 2010-07-28 アイシン・エィ・ダブリュ株式会社 ナビゲーション装置およびプログラム
US9046924B2 (en) * 2009-03-04 2015-06-02 Pelmorex Canada Inc. Gesture based interaction with traffic data
US8619072B2 (en) 2009-03-04 2013-12-31 Triangle Software Llc Controlling a three-dimensional virtual broadcast presentation
US8982116B2 (en) * 2009-03-04 2015-03-17 Pelmorex Canada Inc. Touch screen based interaction with traffic data
US8718910B2 (en) 2010-11-14 2014-05-06 Pelmorex Canada Inc. Crowd sourced traffic reporting
WO2012159083A2 (en) 2011-05-18 2012-11-22 Triangle Software Llc System for providing traffic data and driving efficiency data
US8874366B2 (en) 2011-05-23 2014-10-28 Microsoft Corporation First waypoint distance
CA2883973C (en) 2012-01-27 2021-02-23 Edgar Rojas Estimating time travel distributions on signalized arterials
US9267802B2 (en) * 2012-02-01 2016-02-23 Mitsubishi Electric Corporation Navigation device and method for navigating
US9020760B2 (en) 2012-02-08 2015-04-28 Telogis, Inc. System for classifying streets for vehicle navigation
US10223909B2 (en) 2012-10-18 2019-03-05 Uber Technologies, Inc. Estimating time travel distributions on signalized arterials
US9829328B2 (en) * 2015-08-24 2017-11-28 Alpine Electronics, Inc. Method and apparatus for route calculation involving freeway junction
US11747153B1 (en) 2022-07-21 2023-09-05 Travelshift ehf. Apparatus and associated method for determining a travel itinerary

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845289A (en) * 1972-07-18 1974-10-29 Avon Inc Method and apparatus employing automatic route control system
US4672565A (en) * 1981-03-10 1987-06-09 Nippon Soken, Inc. Direction detecting system for vehicles
JPS57169785A (en) * 1981-04-13 1982-10-19 Nissan Motor Travelling guidance system for car
EP0066397B2 (en) * 1981-05-15 1992-08-05 Nippondenso Co., Ltd. Navigational apparatus for use in automotive vehicles
JPH0619276B2 (ja) * 1981-08-17 1994-03-16 工業技術院長 携帯地図表示装置組体
JPS58151513A (ja) * 1982-03-05 1983-09-08 Alps Electric Co Ltd 移動体の現在位置更新表示装置
US4797841A (en) * 1983-11-28 1989-01-10 Magnavox Government And Industrial Electronics Company Method and apparatus for automatic calibration of magnetic compass
US4611293A (en) * 1983-11-28 1986-09-09 Magnavox Government And Industrial Electronics Company Method and apparatus for automatic calibration of magnetic compass
US4796191A (en) * 1984-06-07 1989-01-03 Etak, Inc. Vehicle navigational system and method
US4914605A (en) * 1984-10-22 1990-04-03 Etak, Inc. Apparatus and method for displaying a map
US4734863A (en) * 1985-03-06 1988-03-29 Etak, Inc. Apparatus for generating a heading signal for a land vehicle
JPH0650559B2 (ja) * 1985-04-03 1994-06-29 日産自動車株式会社 車両用経路誘導装置
US4751512A (en) * 1986-01-21 1988-06-14 Oceanonics, Inc. Differential navigation system for remote mobile users
US4831563A (en) * 1986-07-01 1989-05-16 Pioneer Electronic Corporation Method of processing output data from geomagnetic sensor
US4862398A (en) * 1986-11-18 1989-08-29 Sumitomo Electric Industries, Ltd. Correcting method and correcting errors in a terrestrial magnetism heading sensor
DE3715007A1 (de) * 1987-05-06 1988-11-17 Bosch Gmbh Robert Verfahren und vorrichtung zur kursbestimmung eines landfahrzeugs
US4999783A (en) * 1987-05-11 1991-03-12 Sumitomo Electric Industries, Ltd. Location detecting method
DE3719017A1 (de) * 1987-06-06 1988-12-15 Bosch Gmbh Robert Verfahren und vorrichtung zur bestimmung einer fahrtroute zwischen einem startpunkt und einem zielpunkt
NL8702087A (nl) * 1987-09-04 1989-04-03 Philips Nv Voertuignavigatie-inrichting met weergave van een geselekteerd kaartelement volgens een voorafbepaalde representatienorm.
US4964052A (en) * 1987-10-30 1990-10-16 Nec Home Electronics Ltd. Navigation device for use in a vehicle
JP2637446B2 (ja) * 1987-12-28 1997-08-06 アイシン・エィ・ダブリュ株式会社 ナビゲーション装置
JP2680318B2 (ja) * 1987-12-28 1997-11-19 アイシン・エィ・ダブリュ株式会社 ナビゲーション装置
JPH01173824A (ja) * 1987-12-28 1989-07-10 Aisin Aw Co Ltd ヘルプ機能を備えた車両用ナビゲーション装置
JPH01214711A (ja) * 1988-02-23 1989-08-29 Toshiba Corp ナビゲーション装置
JPH023900A (ja) * 1988-06-16 1990-01-09 Nissan Motor Co Ltd 移動体用現在地表示装置
JPH07117420B2 (ja) * 1988-06-27 1995-12-18 パイオニア株式会社 車載ナビゲーション装置における道路データ生成方法
JPH07119617B2 (ja) * 1988-07-05 1995-12-20 マツダ株式会社 車両用ナビゲーシヨン装置
US4918609A (en) * 1988-10-11 1990-04-17 Koji Yamawaki Satellite-based position-determining system
US5060162A (en) * 1988-12-09 1991-10-22 Matsushita Electric Industrial Co., Ltd. Vehicle in-situ locating apparatus
US5287297A (en) * 1989-11-02 1994-02-15 Matsushita Electric Industrial Co., Ltd. Magnetic direction finder with correcting circuit
US5177685A (en) * 1990-08-09 1993-01-05 Massachusetts Institute Of Technology Automobile navigation system using real time spoken driving instructions
DE69117661T2 (de) * 1990-11-06 1996-07-18 Fujitsu Ten Ltd Richtungssensor mit einem Erdmagnetismussensor und einem Drehgeschwindigkeitskreiselsensor und Navigationssystem, welches diesen Richtungssensor enthält
EP0485120B1 (en) * 1990-11-09 1998-07-29 Sumitomo Electric Industries, Limited Optimum route determination apparatus
JPH04315913A (ja) * 1991-04-16 1992-11-06 Pioneer Electron Corp 車両方位測定装置
US5272638A (en) * 1991-05-31 1993-12-21 Texas Instruments Incorporated Systems and methods for planning the scheduling travel routes
JP2771911B2 (ja) * 1991-08-09 1998-07-02 三菱電機株式会社 車載用ナビゲーション装置
JP2782135B2 (ja) * 1991-12-18 1998-07-30 本田技研工業株式会社 車両走行案内装置
JP2673403B2 (ja) * 1992-06-23 1997-11-05 本田技研工業株式会社 経路探索装置
US5430653A (en) * 1992-10-12 1995-07-04 Masprodenkoh Kabushikikaisha Navigation system with route determination process capable of determining a desired route readily and quickly
JP2598857B2 (ja) * 1992-10-12 1997-04-09 マスプロ電工株式会社 車両の走行経路設定装置
JP2834952B2 (ja) * 1992-10-22 1998-12-14 アルパイン株式会社 経路探索方法
JPH06309595A (ja) * 1993-04-26 1994-11-04 Pioneer Electron Corp ナビゲーション装置
US5412573A (en) * 1993-05-20 1995-05-02 Motorola Inc. Multi-mode route guidance system and method therefor
JP3302445B2 (ja) * 1993-06-18 2002-07-15 パイオニア株式会社 ナビゲーション装置
JPH0727568A (ja) * 1993-07-09 1995-01-27 Zanabui Informatics:Kk 経路誘導装置および経路探索方法
US5519619A (en) * 1994-03-14 1996-05-21 Motorola, Inc. Route planning method for hierarchical map routing and apparatus therefor

Also Published As

Publication number Publication date
US5712788A (en) 1998-01-27
JPH08261783A (ja) 1996-10-11
EP0726447A1 (en) 1996-08-14
CA2167636C (en) 2000-10-10
CA2167636A1 (en) 1996-08-10
DE69624601D1 (de) 2002-12-12
KR960032261A (ko) 1996-09-17
KR100281293B1 (ko) 2001-02-01
JP3408908B2 (ja) 2003-05-19

Similar Documents

Publication Publication Date Title
EP0726447B1 (en) Incremental route calculation
US5731978A (en) Method and apparatus for enhancing vehicle navigation through recognition of geographical region types
CA2225974C (en) Method and apparatus for determining an alternate route in a vehicle navigation system
EP0901001B1 (en) Method and apparatus for displaying current position of a vehicle
CA2224745C (en) Route generation in a vehicle navigation system
CA2217319C (en) Voice guidance timing in a vehicle navigation system
US5910177A (en) Navigating close proximity routes with a vehicle navigation system
EP0803708B1 (en) Route searching and route guidance device
EP0689034B1 (en) Method for identifying highway access ramps for route calculation in a vehicle navigation system
EP0575943B1 (en) Route searching apparatus for vehicle
EP0945707B1 (en) Method and apparatus for route calculation
EP0803707A2 (en) Device for processing road data or intersection data
JP2004028825A (ja) カーナビゲーション装置
JP2002310696A (ja) ナビゲーション装置
JPH09292241A (ja) ナビゲーションシステム
JPH07332993A (ja) ナビゲーション装置
JPH0989579A (ja) 走行軌跡表示機能を備えたナビゲーション装置
JPH09292239A (ja) ナビゲーションシステム
JPH09292240A (ja) ナビゲーションシステム
JPH09292246A (ja) ナビゲーションシステム

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19961113

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VISTEON TECHNOLOGIES, LLC

17Q First examination report despatched

Effective date: 19990907

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 20021106

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20021106

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69624601

Country of ref document: DE

Date of ref document: 20021212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030206

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030529

EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

GBPC Gb: european patent ceased through non-payment of renewal fee
26N No opposition filed

Effective date: 20030807